I have had one piece of lava rock in my tank for a year now. The only reason I bought it is because it's shaped like a donut. (Cue Homer: "Mmmmm...donuts...") It's now encrusted with coralline, zoanthids, and anthelia, and has become my favorite piece of rock in the tank. Everything really took to it, and the fish love to swim thru it.
Peace,
Chip
[ December 20, 2001: Message edited by: marillion ]</p>